Welding wire

ABSTRACT

A welding wire, characterized in that its powder core enclosed in a steel sheath, includes (in percent of the core weight) 4-12 percent of alumina and 1-4 percent of sodium fluosilicate.

United States Patent [72] Inventors Igor Kolstantinovieh PokhodnylPercale K Mecltllkova, 3, Kv. 21; Valery Nikollevich Shleplkov, Ulitsamull, 45, Kw. 9, both of Kiev, U.S.S.R.

[2 l] Appl. No. .464

[22] Filed Feb. 18, 1970 [45] Patented July 27, I971 [32] Priority Mar.24, I969 ['54] WELDING WIRE 1 Claim, No Drawings [52] U.S.Cl. 219/146[Sl] lnt.Cl B23k35/22 [50] 146; ll7/202-207; l48/24-26 [$6]ReferencesCited UNITED STATES PATENTS 3,177,340 4/1965 Danhier PrimaryExaminer-4. V. Truhe Assistant Examiner-Lawrence A. RouseAttorney-Waters, Roditi, Schwartz 8: Nissen core enclosed in a steelsheath, includes (in percent of the core weight) 4-12 percent of aluminaand 1-4 percent of sodium fluosilicate.

WELDING WIRE The invention relates to electrode materials for arcwelding, more specifically to filler wires for open-arc welding andbuiltup welding.

Combination of the mixture of calcium and sodium carbonates with arutile-fluorite-aluminous slag system ensures adequate gas-and-slagprotection of metal in open-arc welding. The chosen ratio of the coreconstituents permits obtain- This invention can be most efl'ectivelyemployed for welding 5 ing a slag with fine physical properties helpingto contain molin vertical and overhead positions. ten metal on thevertical plane and in overhead position.

Wiles W Welding l Reduced gas content in metal is promoted by thepresence p Propemcs are featured y the male in the core of sodiumfluosilicate, which dissociates at a relacarbonatefluorite-type wires,whose core comprises marble, i l |ow temperamm fluorite concentrate,rutile concentrate, soda ash, ferroman lo The advantages of he pro dwelding wire as compared ganese, ferrosilicon, and iron powder. Suchwires have fine .PESE wddins d production properties. and secure gmechani :Jriiegonventional wires, are illustrated by the following examcal pmperties' of the weld metal, in downhand weldin within a wide macofwdding m g A welding wire with a diameter of 2 mm., whose steel sheathHowever the fining wires do not secure stable quamy of 15 takes percentthe total wire weight, and has a core of the the weld metal, andreliable mechanical properties thereof, in fonmvmg composmon: weldingthin metal and in vertical and overhead welding. Yet welding of thinmetal, and welding in positions different from downhand work take asignificant volume of welding opera- 2o mime s lions, and are quiteurgent. flusriw cor-scum" The most important object of the presentinvention is to iggfiz 2: develop a welding wire for open-arc weldingand built-up ,"mmumm welding, wherein the composition of the core wouldprovide ferroeilicon 4% for fine welding and production properties ofthe wire, and rez'f' T i liable mechanical properties of the weld metalwithin a wide 'zg c I, range of welding conditions not only in downhandwork, but p0 also in vertical and overhead positions, as well as inwelding thin metal.

. provides for adequate formation of weld metal and easy and otherobjects are.achleved y means a welding separation of slag in makingcorner and butt welds in vertical mrefm. open'm steel weydmg and bmh'upp winch and overhead positions. The welding process features good a; zi:tim fi i gggfix ggz zg stability, metal losses for splashing areinsignificant. Welding mnmn an r lnosmcon and iron wder \Lher in a gbutt joints on carbon steel with a thickness of 2 mm. and more g i e p0e in vertical and overhead positions resulted in high mechanical ing tothe invention, the powder core, besides the indicated to flies oftheweld metal constituents thereof taken in the following percentages ofthe p pe core weight:

Impact viscosity, marble 8- l5 kgmJcmfl. at a temperfluorite concentratel624 40 tlenstillle l Relzgive attire, t C. ol-

- s r n e on a. on, $121" L: 3 Position of weld kg lm rn.- l't elcent+20 -40 -m Vertic9,l p r 48-50 28-32 1s-21 12-14 fsfmlliwh Overhead49-51 24-30 17-20 10-13 includes alumina 4- l 2 and sodium lluosilicatel-b, the mm punk" The welding conditions are as follows: "was; {gage63585 6 15,? {5? f ght a. in vertical position welding current l=l70-l90a arc voltfeatures adequate welding and production properties, andage a P t for h gh q l y of Weld metal in downhand, Vertical. 50 b. inoverhead position welding current bl 80-200a arc and overhead welding.The adequate properties are ensured voltage U=20-22v. 28 wedmgconditionsfi quite: t: A welding wire with a diameter of 2 2 mm whosesteel tube practice, w 16 is very important, since t e mam met 0 andoverhead wading is the semiautomatic process. makes up 72.5 percent ofthe total wire weight and comprises The present invention will be moreclearly understood from m Its core the exemplary embodiments thereofgiven in the following description.

The proposed welding wire for open-arc welding and builtmarble m, upwelding consists of a steel sheath with a powder core, com- ""f' prising(in percent of the core weight): :gfig A? V l Mm-flu W I I mm.ferromanganese 6.4% mar g 5 ferrosilicon 4.6% fluorite concentrate 16-24alumina 7% rltile concentrate 4-16 sodium fluoxilicate 41, 5 g ironpowder 20%, ferrous-pane 4-8 5 fermsilieon 3-6 ale-ha 4-l2 IR l-4, v v Iw NW4. the relt being irol powder. features excellent welding andproduction properties in 79 downhand and vertical welding. Themechanical properties of 3 4 the weld metal and the weld joint are at ahigh level, which is l A welding wire for open-arc welding and builtupwelding proved by the following data. of steel, consisting of a steelsheath with a powder core comlnipact viscosity. lrgJcm. Tensile Relativeat a t Ci of strength. elongation.

Nora-Given 1n the numerator are the extreme value, and in thedenominator the average values, of the results of testing 3-6 samples.Welding was carried out with direct P ff we e 9 9'??- The weldingconditions were as follows: prising, in percent of the core weight: a.in downhand position welding current b260-280a, arc marble 8H5 voltageU=24-26W fluorite concentrate rutile concentrate 4-16 h. in verticalposition welding current #1 80l90a, are uh VOhage U=2 I 22V.lerromanganese 4-8 ferrolilicon 3-6 The illustrated examples give asulficient characteristic of alumina 4-12 d' m fluos'licate l--4. of theproposed the rcst lfeiii g iron powder. What we claim is:

1. A welding wire for open-arc welding and built-up welding of steel,consisting of a steel sheath with a powder core comprising, in percentof the core weight: marble 8-15 fluorite concentrate 16-24 rutileconcentrate 4-16 soda ash 4-18 ferromanganese 4-8 ferrosilicon 3-6alumina 4-12 sodium fluosilicate 1-4, the rest being iron powder.